1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc768c1ccb63ae49a6e8d4867b6e6977e742e9c015a3179e24a9212f7d8dafb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ead6ab99-6b88-416d-a875-9bcce28083a8.json and https://artists.proofprofile.net/proofs/artist/ead6ab99-6b88-416d-a875-9bcce28083a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5f57e83ae120907374870dc26844456d2504c3cfa7252818fc93a22adb772. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGR32111791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04667d491142c44400faf5ef0a72c08656b3a6dd777ef611bc9a27098b4427d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2130144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55355c30c1abf5678e5abd5bdbf377ceb5175ffd2d71633488b7fc09e2aea5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2138789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235de3fc26bba8cb69afa903d59ea61f25de0bd825b4dd77a9c69f4db697e36c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92154109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ed69545721868964f56acfcaaa17387416397e09d8d0b741da45f5175f463. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92138287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876996e8107b83a244c7b25143444603414c189edcc61953544612bbca075bba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92119963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681bee1be9dafae527adca72df3d316ecd7bc5d10e0e08dea9ee78efdf87a877. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92120134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d362421298fe3ea68eb5f697ca979b2eca365d9ce39d0b8b14fc5695fc1cf94. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92142521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2528bc6634f4944526476dafbf426089b8487aba32e71ff17530d1a2b047439. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTL92157173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffce51def7e032a58e961dfe5698b96d268a372f3df7c542888ca833a477ec02. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2390617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55a7f971f4c9fb3eb2ea28cb7f95bce9124d08310933aa9733fb8f11893025. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2348193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019f96238037f9d8807740dd24be2ead7981a01238ad50d9c53c7f0ed41d562. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2332411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6202268b9c0e302fd035fb794bc0008b49450ca0d1f49e9315758330215341. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2454163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a07c2d125aac6266da960f3065020779a09e3df47e7bdc91e45353f95035590. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2423526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009fc792204438d8dd6013563c6264e64c1d0823dad196a796b7afaa10f37fd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2502446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f812c09dbfa25ffa92abf806f8e261e878758f2984780823bcd66a1f9e92a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL5XG2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ade09f28b8ee9e150d1d1ab601bbcbd5febcc8f5db4cefb542e24ab74f405f5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2087056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2dde574d6874eb9eaabe67032be89d5e47f3d3dfab8ca18b1bfb0aaee509b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGR32062218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5eef55a06917d8186fd8bd8d84778a90e3f0c114ffcec43772b3dc1268020e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART0G1807222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8de7bcb475e8572b3276c09073f92311d47dc26b85c5c2fca08f2207c0f7a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2257972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd07a77c5a274cd53307ae0e710aaa3aa363631aa56c316d47ed55f5ab50cda9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2316684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f00bb63cf03da69f5924b8b49fc8641d4996ac863fbecf7528d740e2e0e4f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22232808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d9b34283dc58931e95af41f9b08bb4fc4a43668a14c2ab5c468c72090d0db7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2290282.